Ptychographic X‐Ray Imaging of Colloidal Crystals. Issue 3 (24th November 2017)

• Record Type: Journal Article
• Authors: Lazarev, Sergey; Besedin, Ilya; Zozulya, Alexey V.; Meijer, Janne‐Mieke; Dzhigaev, Dmitry; Gorobtsov, Oleg Yu.; Kurta, Ruslan P.; Rose, Max; Shabalin, Anatoly G.; Sulyanova, Elena A.; Zaluzhnyy, IvanA.; Menushenkov, Alexey P.; Sprung, Michael; Petukhov, Andrei V.; Vartanyants, Ivan A.
• Is Part Of: Small. Volume 14:Issue 3(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-11-24
• Subjects: coherent X‐ray diffraction imaging -- colloidal crystals -- domain structures -- ptychography; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201702575
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Ptychographic coherent X‐ray imaging is applied to obtain a projection of the electron density of colloidal crystals, which are promising nanoscale materials for optoelectronic applications and important model systems. Using the incident X‐ray wavefield reconstructed by mixed states approach, a high resolution and high contrast image of the colloidal crystal structure is obtained by ptychography. The reconstructed colloidal crystal reveals domain structure with an average domain size of about 2 µm. Comparison of the domains formed by the basic close‐packed structures, allows us to conclude on the absence of pure hexagonal close‐packed domains and confirms the presence of random hexagonal close‐packed layers with predominantly face‐centered cubic structure within the analyzed part of the colloidal crystal film. The ptychography reconstruction shows that the final structure is complicated and may contain partial dislocations leading to a variation of the stacking sequence in the lateral direction. As such in this work, X‐ray ptychography is extended to high resolution imaging of crystalline samples. Abstract : Ptychographic coherent X‐ray imaging is applied to obtain a projection of the electron density of the colloidal crystal. The reconstructed colloidal crystal image reveals random hexagonal close‐packed domain structure with predominantly face‐centered cubic structure and an average domain size of about 2 µm. By this work, X‐ray ptychography is extended to high resolution imaging of crystalline samples.